Bonding hand railing

[scott minter]

Good Afternoon

I need to bond a removable hand rail. I wanted to use something similar to 1/4 inch RCA jack

a pin and sleeve type connector. The pin would need to accommodate a number 6 fine strand conductor

and the socket would bolt or attach to the steel catwalk. We have a pipe bond clamp that accepts a number 6

for the railing side. Any thoughts ?

If there is an easier better looking way I am open to suggestions.

Thank you.

 

[petersonra]

Why do you need to bond it with a wire? Is there no metal to metal contact between the handrail and some part that is already bonded?

I am not sure the pin you are wanting to bond with is listed for grounding or bonding.

 

[scott minter]

Correct on the RCA jack not being listed. That is my question is there something like that ? Like one pin out of a crouse hinds hazardous location

receptacle ? Yes there is metal to metal connection it is a removable hand rail that fits in a socket. The bond between the two needs to be 2.5 milliohm

or less.

Thanks for your help.

 

[petersonra]

Correct on the RCA jack not being listed. That is my question is there something like that ? Like one pin out of a crouse hinds hazardous location

receptacle ? Yes there is metal to metal connection it is a removable hand rail that fits in a socket. The bond between the two needs to be 2.5 milliohm

or less.

Thanks for your help.

#6 is about .4 ohms/1000 ft.

0.0025 ohms is about 6 feet of cable.

I would not be surprised to find that the contact resistance is more than 0.0025 Ohms.

I would be looking at some kind of direct connection like a machine screw that could be removed when the hand rail has to be taken out.

 

[luckylerado]

How about a ring terminal on one end that ties to a welded threaded stud with a wing nut

 

[petersonra]

How about a ring terminal on one end that ties to a welded threaded stud with a wing nut

I kind of had in mind a compression (ring) terminal connected via a machine screw, but a wing nut and a stud is probably easier and just as good. might even be slightly lower resistance.

I have my doubts about it meeting the resistance spec though.

 

[DAWGS]

#6 is about .4 ohms/1000 ft.

0.0025 ohms is about 6 feet of cable.

I would not be surprised to find that the contact resistance is more than 0.0025 Ohms.

I would be looking at some kind of direct connection like a machine screw that could be removed when the hand rail has to be taken out.

This is how we do it if it needs to be removable. We will use a bonding strap though.

 

[scott minter]

Ring lugs and a stud welder is how we are doing the rest of the bonds with a short piece of #6 (M5086/2-6-5).

We were just hoping there might be something that could not be dropped (a nut of any kind) during the hand rail removal.

The are has 100% tool control , meaning tied to your wrist.

Thanks for the suggestions. This might be all we can do.

 

[luckylerado]

Try a search for aircraft grounding cable.